Means for sealing the crimped end portion of a wave guide

ABSTRACT

A wave guide fitting has a crimped over end cut axially between the end face of an attachment part and the shaped part forming the conductor part forming a continuation of the structure. The shaped part makes contact with the end via a radially inner annular land, with the interposition of a seal, which is placed in a groove in the end annular surface of the attachment part and has two pressing edges. Of these edges the radially inner one rests on the rear side of the crimped over end and the radially outer one rests on the end face of the continuing conductor part. The seal is constructed as a membrane-like disc, on which as pressing edges sealing lands are molded with a radial spacing between them. The disc, which is matched to suit the shape of the attachment flanges, has a further external sealing land, which rests against one of these flanges and provides for external sealing of the intermediate space between the two metal parts.

United States Patent Spinner et al.

[ MEANS FOR SEALING THE CRIMPED END PORTION OF A WAVE GUIDE [76] Inventors: Georg Spinner, Erzgiessereistr. 33, 8

Munich 2; Franz X. Pitschi, Nederlingerstr. 44, 8 Munich I), both of Germany [22] Filed: July 13, I973 21] Appl. No: 379,054

[ June 17, 1975 Primary Examiner-Alfred E. Smith Assistant E.ruminer-Wm. H. Punter Attorney, Agent, or Firm-Ostrolenk, Faber, Gerb & Soffen 1 ABSTRACT A wave guide fitting has a crimped over end cut axially between the end face of an attachment part and the shaped part forming the conductor part forming a continuation of the structure. The shaped part makes contact with the end via a radially inner annular land. with the interposition of a seal, which is placed in a groove in the end annular surface of the attachment part and has two pressing edges. Of these edges the radially inner one rests on the rear side of the crimped over end and the radially outer one rests on the end face of the continuing conductor part. The seal is constructed as a membrane-like disc, on which as pressing edges sealing lands are molded with a radial spacing between them. The disc, which is matched to suit the shape of the attachment flanges, has a further external sealing land, which rests against one of these flanges and provides for external sealing of the intermediate space between the two metal parts.

10 Claims. 6 Drawing Figures MEANS FOR SEALING THE CRIMPED END PORTION OF A WAVE GUIDE BACKGROUND OF INVENTION l. Field to Which Invention Relates The invention relates to a fitting for preferably oval, corrugated wave guides whose crimped over end is cut axially and is then positioned between the end face of an attachment part and the shaped part that forms part of the conductor that forms a continuation of the structure. The shaped part of the conductor makes contact with the crimped over end via a radially inner annular land, located on a sealing means which sealing means is placed in a groove in the end annular surface of the attachment part. The sealing means has two pressing lands, of which the radially inner one rests on the rear side of the crimped over end and the radially outerone rests on the end face of the continuing conductor part.

2. The Prior Art Such a fitting is described in the German Patent Specification No. 1,490,798 published June I9, 1969. The sealing ring used in that case has the crosssectional shape of a numeral 3. The free limbs of the sealing ring rest against the bottom of the groove and the sealing edges or lands are formed by the transitional curves. In the case of this sealing ring the two sealing edges or lands lie immediately adjacent to each other. In order to ensure that the sealing functions aimed at are in fact achieved, high quality shaping of the edge of the crimped over end of the hollow conductor or wave guide is necessary. Thus, one sealing function does not by way of example occur if the sealing edge or land (i.e. the radially outward one) that is lying against the end face of the male or shaped part over a large part of the periphery or over the whole periphery of that land also lies against the crimped over end of the hollow conductor or wave guide. Furthermore, a scaling function is not properly ensured if the sealing edge or land (i.e. the radially inward one) associated with the crimped over end of the corrugated wave guide lies partly or completely against the end face of the continuing conductor shaped part. In order to ensure this desired contact with radially outer edge of the crimped over end of the corrugated tube wave guide, the guide must be exactly trimmed to size, something which necessitates very difficult machining operations, and in this respect it must be taken into account that the assembly cannot always be carried out by means ofa template, and instead must frequently be undertaken simply by using a hammer.

SUMMARY OF INVENTION On aim of the present invention in connection with a fitting of the above-mentioned construction is that of simplifying assembly and making possible a high quality and permanent seal between the continuing conductor part and the wave guide while at the same time ensuring satisfactory electrical contacting between these two parts.

In order to achieve these and other aims the invention provides that the seal is constructed as a membrane-like disc, on which as pressing edges sealing lands are molded with a significant radial spacing be tween them and in that the disc which is matched to suit the shape of the attachment flanges of the conductor part and the attachment part, has a further external sealing land, which rests against one of these flanges and provides for external sealing of the intermediate space between the two metal parts.

This construction is intended to ensure that the two inner sealing edges rest individually on the surfaces which are allocated to them, even though the crimped over edge of the wave guide is not precisely trimmed to size. The scaling lands are held by the membrane-like disc supporting them with their predetermined safety spacing, and however owing to the flexibility of the disc each sealing land can fulfill its individual sealing function without any mutual interference having to be feared. The outer sealing arrangement prevents the access of moisture into the cavity between the two fitting parts. Therefore, three separate sealing systems, only held together by the central membrane, are formed, and the distance between the two inner sealing lands on the rear side ofthe crimp disc can be made so large that irregularities in the crimp disc, which can occur with out it being possible to avoid them, cannot lead to any leaks.

The outer sealing land can run parallel to the inner sealing land and be oval like it. Instead of this it can however also be circular and therefore for large extents have a still greater safety distance between it and the inner sealing land.

The sealing disc preferably consists of silicone rubher.

In accordance with a further embodiment of the invention the annular cavity between the attachment part and the corrugated tube is filled with an elastic self hardening material or composition so that an air and moisture tight seal is formed between the corrugated tube, or the casing surrounding it respectively, and the attachment part. For this purpose a relatively hard synthetic resin can be used.

In accordance with a further embodiment of the in vention instead of the injected composition it is possible to make use of an oval ring with a circular crosssection shaped so as to match the cable. This circular ring can then be clamped by a circular plate with an oval shoulder.

The corrugated casing is cut obliquely in a plane corresponding to the pitch of the helix of the corrugated casing so that the crimped over end is broadened out at all positions of the periphery as far as the same concentric oval.

LIST OF SEVERAL VIEWS OF DRAWINGS In what follows an embodiment of the invention will be described with reference to the accompanying drawings.

FIG. 1 is a section of a wave guide or hollow conductor fitting with a seal, constructed in accordance with the invention, on the line II (FIG. 2).

FIG. 2 shows a view from the cable side of the sealing disc.

FIG. 3 shows a section on the line IIIIII in accordance with FIG. 2.

FIG. 4 shows a section corresponding to FIG. I of a wave guide fitting with a sealing ring between the cable and the anchoring means.

FIG; 5 shows a section on the line V-V in accordance with FIG. 4.

' FIG. 6 is a sectional view of the end of the corrugated tube.

DESCRIPTION OF PREFERRED EMBODIMENTS The corrugated casing of the cable is surrounded by a plastic casing 12, which has been removed in the front or right hand section. Onto the cable an attachment part I4, provided with an inner contour of a suitable shape, is placed as a head part or anchoring part. This attachment part has a radially inner narrow end contacting land 16, with which the outwardly widened and crimped over end 18 of the corrugated tube casing 10 is pressed against the end contact annular surface 20 of the continuing conductor part 22, which can be constructed as a transitional transformer. The two parts l4 and 22 are pressed against each other by tightening or clamping screws 24, which pass through holes of the annular flanges of both parts.

The end annular face of the attachment part 14 has a groove 26 similar to the transitional form of the corrugated tube radially outside the contact ring land 16.

For providing a sealing action a sealing disc 28 in accordance with FIGS. 2 and 3 is provided, which corresponds internally to the shape of the hollow conductor 10 and externally is constructed in accordance with the flanges of the attachment part and the continuing conductor part, that is to say circularly. This sealing disc 28 consists of a flexible membrane 30, which carries sealing lands on both sides. The radially inner limit is formed by a sealing land 32, which on the cable facing side rests on the bottom of the groove 26 and on the other side lies against the crimped over end 18 of the wave guide tube. With a radial spacing from the sealing land 32 there is a sealing land 34, which on the cable facing side again lies against the inside surface of the groove 26 and on the other side lies against the end face 20 of the continuing conductor part 22. The sealing land 34 can be oval so as to correspond to the land 32, as is shown in FIG. 2. Instead of this the sealing land can however be made circular. As is to be seen more particularly from FIG. 3, in the case of this embodiment the membrane connecting the sealing land does not lie in the center, but is laterally offset in such a manner that the sealing part on the cable facing side of the lands is longer than the oppositely placed one in accordance with FIG. 3, right-hand part of the lands. Instead of the single piece groove 26 the end face of the attachment part 14 can be provided with an oval double groove or with an oval and a circular groove in order to accept the separate sealing lands 32 and 34 individually.

At the radially outer end the sealing disc is limited by a circular sealing strip 36, which again projects to both sides of the membrane, that is to say on the right-hand side in terms of FIG. 3 to the same extent as the sealing strips 32 and 34, while the left-hand edge of the sealing strip 36 is set back somewhat as compared with the lefthand edges of the sealing strips 32, 34. In detail the cross-sectional form of the annular disc can be seen from FIG. 3 of the drawing. The sealing land 36 is passed around the passage holes 38 for the bolts 24 in a section 37. The diameter of these holes 38 is less than the diameter of the screws 24 so that the sealing disc prevents the screws from falling out in the disassembled condition of the unit.

The space between the corrugated tube casing 10, or the plastic casing 12 respectively, and the attachment sleeve portion of the attachment part. which is behind the corrugated tube section 40 is filled with a elastic 4 self-curing composition 42, which is injected through a hole which can be closed by an inserted screw 44.

As can be seen from FIG. 1 the sealing disc in accordance with FIGS. 2 and 3 ensures the following sealing function:

1. Sealing between the end face of the attachment part 14 and the rear side of the crimped over conductor end 18 radially inner sealing land 32.

2. Between the end face of the attachment part 14 and the end face of the continuing conductor part 22: sealing strip 34.

3. Between the attachment flange 46 of the attachment part 14 and the attachment flange 48 of the continuing conductor part: sealing land 36.

As will be seen from FIG. 3 the axial extent of the right-hand part of the sealing land 34 is greater than the extent of the inner sealing land 32 by an amount equal to the thickness of the corrugated tube or its crimped on end so that the sealing pressure at the crimped over end and at the end face is equal.

FIG. 4 shows an embodiment which is modifled as regards the seal between the corrugated casing and the anchoring means so as to depart from the embodiment in accordance with FIG. I. Instead of the injected seal ing composition 42 in accordance with FIG. I in the case of the embodiment in accordance with FIG. 4 oval sealing rings 52 with a circular cross-section are inserted between the casing 12 and the attachment sleeve of attachment part 14. Rings 52, rest on a step 54 of the attachment part 14. The axial clamping action is car ried out by means of a support sleeve 56 with an oval form (FIG. 5), which is carried by a circular flange 58. This annular flange is axially clamped by a nut 60 with an internal collar axially.

In order to cut off the corrugated casing before the crimping action use is preferably made of a template saw, which makes an oblique cut in accordance with the pitch of the helical line of the corrugations of the cable so that after the crimping over the crimped over edge extends as far as an oval 62 lying concentrically in relation to the sealing land 32. The line of cut is denoted by reference numeral 64 in FIG. 6. The crimping over is carried here around the end face denoted with reference numeral 66. As will be seen the cut is carried out as far as the narrow side of the oval and as far as the longitudinal axis of the oval. The cut is carried out in such a manner that the crimped over edge which is formed runs symmetrically with respect to the center axis of the oval.

In the case of corrugated casing tubes with annular corrugation of a helical one the cut should be made perpendicular to the axis preferably at the same level as a crest of a corrugation.

We claim:

1. Means for securing the crimped end of a wave guide, comprising:

a wave guide comprised of an annular, tubular conductor, said conductor having an end portion that is to be crimped and secured;

an attachment part; a separate conductor part for serving as a continuation of said conductor; said attachment part and said conductor part having respective opposed end faces defining an annular gap therebetween. said attachment part and said conductor part being oriented and positioned such that said conductor end portion is crimped so as to be oriented to extend generally radially outwardly of said conductor and said conductor end portion is in said gap between said opposed end faces;

a flexible, membrane-like, annular sealing element in said gap; said sealing element having a radially more inwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said sealing element also having a radially more outwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said inward and said outward lands being spaced apart radially a first distance; both said sealing element lands project both toward said conductor part from one side of said sealing element and toward said attachment part from the opposite side of said sealing element;

said conductor end portion being of a length such that it extends radially outward so as to be between said inward land and said conductor part end face; said conductor end portion having an end edge and said end portion being of a length such that said end edge is between said inward and said outward lands;

the lengths axially of said conductor of said lands on the said attachment part side of said sealing element are greater than the lengths axially of said conductor of the respective said lands on said conductor part side of said sealing element; said sealing element being of a thickness and said lands being of a length axially of said conductor on said conductor part side of said sealing element and said sealin g elements having such flexibility that said inward land clamps said conductor end portion against said conductor part end face and said outward land clamps against said conductor part end face without contacting said conductor end portion',

said first radial distance between said inward and outward lands being great enough to cause said lands to be separated from each other a distance at their respective clamping surfaces with said conductor end portion and with said conductor part end face to provide such clearance as to maintain the recited relationship of said conductor end portion with said inward and outward lands despite normal non-uniformity of said radial length of said conductor end portion.

2. The means for securing the crimped end of a wave guide of claim 1, wherein the length axially of said conductor of said inward land on said conductor part side of said sealing element is shorter than the length axially of said conductor of said outward land on the same side of said sealing element and that the extent that said inward land is shorter is the thickness of said conductor end portion as it passes between said inward land and said conductor part end face.

3. Means for securing the crimped end of a wave guide, comprising:

a wave guide comprised of an annular, tubular conductor, said conductor having an end portion that is to be crimped and secured;

an attachment part; a separate conductor part for serving as a continuation of said conductor; said attachment part and said conductor part having respective opposed end faces defining an annular gap therebetween, said attachment part and said conductor part being oriented and positioned such that said conductor end portion is crimped so as to be oriented to extend generally radially outwardly of said conductor and said conductor end portion is in said gap between said opposed end faces;

a flexible, membrane-like, annular sealing element in said gap; said sealing element having a radially more inwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said sealing element also having a radially more outwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said inward and said outward lands being spaced apart radially a first distance;

said conductor end portion being of a length such that it extends radially outward so as to be between said inward land and said conductor part end face; said conductor end portion having an end edge and said end portion being of a length such that said end edge is between said inward and said outward lands;

said sealing element being of a thickness and said lands being of a length axially of said conductor and said sealing elements having such flexibility that said inward land clamps said conductor end portion against said conductor part end face and said outward land clamps against said conductor part end face without contacting said conductor end portion;

the length axially of said conductor of said inward land is preformed to be shorter than the preformed length axially of said conductor of said outward land by the thickness of said conductor end portion as said conductor passes between said inward land and said conductor part end face;

said first radial distance between said inward and outward lands being great enough to cause said lands to be separated from each other a distance at their respective clamping surfaces with said conductor end portion and with said conductor part end face to provide such clearance as to maintain the recited relationship of said conductor end portion with said inward and outward lands despite normal non-uniformity of said radial length of said conductor end portion.

4. Means for securing the crimped end of a wave guide, comprising: a wave guide comprised of an annular, tubular conductor, said conductor having an end portion that is to be crimped and secured;

an attachment part; a separate conductor part for serving as a continuation of said conductor; said attachment part and said conductor part having respective opposed end faces defining an annular gap therebetween, said attachment part and said conductor part being oriented and positioned such that said conductor end portion is crimped so as to be oriented to extend generally radially outwardly of said conductor and said conductor end portion is in said gap between said opposed end faces;

a flexible, membrane-like, annular sealing element in said gap; said sealing element having a radially more inwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said sealing element also having a radially more outwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said inward and said out' ward lands being spaced apart radially a first dis tance; said conductor end portion being of a length such that it extends radially outward so as to be between said inward land and said conductor part end face; said conductor end portion having an end edge and said end portion being of a length such that said end edge is between said inward and said outward lands; said sealing element being of a thickness and said lands being of a length axially of said conductor and said sealing elements having such flexibility that said inward land clamps said conductor end portion against said conductor part end face and said outward land clamps against said conductor part end face without contacting said conductor end portion; said first radial distance between said inward and outward lands being great enough to cause said lands to be separated from each other a distance at their respective clamping surfaces with said conductor end portion and with said conductor part end face to provide such clearance as to maintain the recited relationship of said conductor end portion with said inward and outward lands despite normal non-uniformity of said radial length of said conductor end portion; said sealing element extends radially outwardly a distance beyond said outward land to an external, annular, sealing land that is spaced from said outward land and that is of a length axially of said conductor sufficient to cause said sealing element at said external land to engage both said end faces and to seal said gap between said end spaces;

attachment means for fastening said attachment part and said conductor part together; receiving holes extending into both said attachment part and said conductor part, extending through said end faces and aligned across said gap between said end faces; said attachment means being secured in said receiving holes;

passage holes through said sealing element through which said attachment means pass;

said external land passing around said sealing element passage holes radially outwardly thereof with respect to said conductor.

5. The means for securing the crimped end of a wave guide of claim 4, wherein said attachment means are screws; each said passage hole is aligned with a respective said receiving hole in said attachment part and a respective said receiving hole in said conductor part; said passage holes are of a smaller diameter than said attachment means screws.

6. The means for securing the crimped end of a wave guide of claim 4, further comprising a sealing sleeve section of said attachment part and surrounding said conductor and extending away from said conductor part; said sealing sleeve being of a size to define a sealable gap between said sealing sleeve and said conductor; an elastic, self-curing composition in said sealing gap for sealing it.

7. Means for securing the crimped end of a wave guide, comprising:

a wave guide comprised of an annular, tubular conductor, said conductor having an end portion that is to be crimped and secured;

an attachment part; a separate conductor part for serving as a continuation of said conductor; said attachment part and said conductor part having respective opposed end faces defining an annular gap therebetween, said attachment part and said conductor part being oriented and positioned such that said conductor end portion is crimped so as to be oriented to extend generally radially outwardly of said conductor and said conductor end portion is in said gap between said opposed end faces;

a flexible, membrane-like, annular sealing element in said gap; said sealing element having a radially more inwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said sealing element also having a radially more outwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said inward and said outward lands being spaced apart radially a first distance;

said conductor end portion being of a length such that it extends radially outward so as to be between said inward land and said conductor part end face; said conductor end portion having an end edge and said end portion being of a length such that said end edge is between said inward and said outward lands;

said sealing element being of a thickness and said lands being of a length axially of said conductor and said sealing elements having such flexibility that said inward land clamps said conductor end portion against said conductor part end face and said outward land clamps against said conductor part end face without contacting said conductor end portion;

said first radial distance between said inward and outward lands being great enough to cause said lands to be separated from each other a distance at their respective clamping surfaces with said conductor end portion and with said conductor part end face to provide such clearance as to maintain the recited relationship of said conductor end portion with said inward and outward lands despite normal non-uniformity of said radial length of said conductor end portion;

a sealing sleeve section of said attachment part surrounding said conductor and extending away from said conductor part; said sealing sleeve being of a size to define a sealable gap between said sealing sleeve and said conductor;

a sealing ring in said scalable gap; said sealing ring being shaped to sealingly pass around the exterior of said conductor and being of a generally circular cross-section and being of a thickness to seal closed said scalable gap.

8. The means for securing the crimped end of a wave guide of claim 7, further comprising sealing ring compression means extending into said scalable gap and engaging said sealing ring on the side thereof which causes said compression means to bias said sealing ring against said attachment part and said conductor to seal said scalable gap.

9. The means for securing the crimped end of a wave guide of claim 8, wherein said ring compression means comprise means movable along said conductor toward said conductor part and includes an abutment on said movable means that is biasable against said sealing ring; means in said sealable gap for restraining said sealing ring against movement under bias of said ring compression means.

10. Means for securing the crimped end of a wave guide, comprising:

a wave guide comprised of an annular, tubular conductor, said conductor having an end portion that is to be crimped and secured;

an attachment part; a separate conductor part for serving as a continuation of said conductor; said attachment part and said conductor part having respective opposed end faces defining an annulargap therebetween, said attachment part and said conductor part being oriented and positioned such that said conductor end portion is crimped so as to be oriented to extend generally radially outwardly of said conductor and said conductor end portion is in said gap between said opposed end faces;

a flexible, membrane-like, annular sealing element in said gap, said sealing element having a radially more inwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said sealing element also having a radially more outwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said inward and said outward lands being spaced apart radially a first distance;

said conductor end portion being of a length such that it extends radially outward so as to be between said inward land and said conductor part end face; said conductor end portion having an end edge and said end portion being of a length such that said end edge is between said inward and said outward lands;

said sealing element being of a thickness and said lands being of a length axially of said conductor and said sealing elements having such flexibility that said inward land clamps said conductor end portion against said conductor part end face and said outward land clamps against said conductor part end face without contacting said conductor end portion;

said first radial distance between said inward and outward lands being great enough to cause said lands to be separated from each other a distance at their respective clamping surfaces with said conductor end portion and with said conductor part end face to provide such clearance as to maintain the recited relationship of said conductor end portion with said inward and outward lands despite normal non-uniformity of said radial length of said conductor end portion;

said conductor being ovular in shape and at least said inward land being coaxially ovular to said conductor and being correspondingly shaped;

said conductor end portion having a free end edge which is cut off obliquely such that when said end portion is crimped into said gap, said end portion extends radially outwardly from the fold of the crimp generally a constant distance annularly around said end portion. 

1. Means for securing the crimped end of a wave guide, comprising: a wave guide comprised of an annular, tubular conductor, said conductor having an end portion that is to be crimped and secured; an attachment part; a separate conductor part for serving as a continuation of said conductor; said attachment part and said conductor part having respective opposed end faces defining an annular gap therebetween, said attachment part and said conductor part being oriented and positioned such that said conductor end portion is crimped so as to be oriented to extend generally radially outwardly of said conductor and said conductor end portion is in said gap between said opposed end faces; a flexible, membrane-like, annular sealing element in said gap; said sealing element having a radially more inwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said sealing element also having a radially more outwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said inward and said outward lands being spaced apart radially a first distance; both said sealing element lands project both toward said conductor part from one side of said sealing element and toward said attachment part from the opposite side of said sealing element; said conductor end portion being of a length such that it extends radially outward so as to be between said inward land and said conductor part end face; said conductor end portion having an end edge and said end portion being of a length such that said end edge is between said inward and said outward lands; the lengths axially of said conductor of said lands on the said attachment part side of said sealing element are greater than the lengths axially of said conductor of the reSpective said lands on said conductor part side of said sealing element; said sealing element being of a thickness and said lands being of a length axially of said conductor on said conductor part side of said sealing element and said sealing elements having such flexibility that said inward land clamps said conductor end portion against said conductor part end face and said outward land clamps against said conductor part end face without contacting said conductor end portion; said first radial distance between said inward and outward lands being great enough to cause said lands to be separated from each other a distance at their respective clamping surfaces with said conductor end portion and with said conductor part end face to provide such clearance as to maintain the recited relationship of said conductor end portion with said inward and outward lands despite normal non-uniformity of said radial length of said conductor end portion.
 2. The means for securing the crimped end of a wave guide of claim 1, wherein the length axially of said conductor of said inward land on said conductor part side of said sealing element is shorter than the length axially of said conductor of said outward land on the same side of said sealing element and that the extent that said inward land is shorter is the thickness of said conductor end portion as it passes between said inward land and said conductor part end face.
 3. Means for securing the crimped end of a wave guide, comprising: a wave guide comprised of an annular, tubular conductor, said conductor having an end portion that is to be crimped and secured; an attachment part; a separate conductor part for serving as a continuation of said conductor; said attachment part and said conductor part having respective opposed end faces defining an annular gap therebetween, said attachment part and said conductor part being oriented and positioned such that said conductor end portion is crimped so as to be oriented to extend generally radially outwardly of said conductor and said conductor end portion is in said gap between said opposed end faces; a flexible, membrane-like, annular sealing element in said gap; said sealing element having a radially more inwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said sealing element also having a radially more outwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said inward and said outward lands being spaced apart radially a first distance; said conductor end portion being of a length such that it extends radially outward so as to be between said inward land and said conductor part end face; said conductor end portion having an end edge and said end portion being of a length such that said end edge is between said inward and said outward lands; said sealing element being of a thickness and said lands being of a length axially of said conductor and said sealing elements having such flexibility that said inward land clamps said conductor end portion against said conductor part end face and said outward land clamps against said conductor part end face without contacting said conductor end portion; the length axially of said conductor of said inward land is preformed to be shorter than the preformed length axially of said conductor of said outward land by the thickness of said conductor end portion as said conductor passes between said inward land and said conductor part end face; said first radial distance between said inward and outward lands being great enough to cause said lands to be separated from each other a distance at their respective clamping surfaces with said conductor end portion and with said conductor part end face to provide such clearance as to maintain the recited relationship of said conductor end portion with said inward and outward lands despite normal non-uniformity of said radial lEngth of said conductor end portion.
 4. Means for securing the crimped end of a wave guide, comprising: a wave guide comprised of an annular, tubular conductor, said conductor having an end portion that is to be crimped and secured; an attachment part; a separate conductor part for serving as a continuation of said conductor; said attachment part and said conductor part having respective opposed end faces defining an annular gap therebetween, said attachment part and said conductor part being oriented and positioned such that said conductor end portion is crimped so as to be oriented to extend generally radially outwardly of said conductor and said conductor end portion is in said gap between said opposed end faces; a flexible, membrane-like, annular sealing element in said gap; said sealing element having a radially more inwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said sealing element also having a radially more outwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said inward and said outward lands being spaced apart radially a first distance; said conductor end portion being of a length such that it extends radially outward so as to be between said inward land and said conductor part end face; said conductor end portion having an end edge and said end portion being of a length such that said end edge is between said inward and said outward lands; said sealing element being of a thickness and said lands being of a length axially of said conductor and said sealing elements having such flexibility that said inward land clamps said conductor end portion against said conductor part end face and said outward land clamps against said conductor part end face without contacting said conductor end portion; said first radial distance between said inward and outward lands being great enough to cause said lands to be separated from each other a distance at their respective clamping surfaces with said conductor end portion and with said conductor part end face to provide such clearance as to maintain the recited relationship of said conductor end portion with said inward and outward lands despite normal non-uniformity of said radial length of said conductor end portion; said sealing element extends radially outwardly a distance beyond said outward land to an external, annular, sealing land that is spaced from said outward land and that is of a length axially of said conductor sufficient to cause said sealing element at said external land to engage both said end faces and to seal said gap between said end spaces; attachment means for fastening said attachment part and said conductor part together; receiving holes extending into both said attachment part and said conductor part, extending through said end faces and aligned across said gap between said end faces; said attachment means being secured in said receiving holes; passage holes through said sealing element through which said attachment means pass; said external land passing around said sealing element passage holes radially outwardly thereof with respect to said conductor.
 5. The means for securing the crimped end of a wave guide of claim 4, wherein said attachment means are screws; each said passage hole is aligned with a respective said receiving hole in said attachment part and a respective said receiving hole in said conductor part; said passage holes are of a smaller diameter than said attachment means screws.
 6. The means for securing the crimped end of a wave guide of claim 4, further comprising a sealing sleeve section of said attachment part and surrounding said conductor and extending away from said conductor part; said sealing sleeve being of a size to define a sealable gap between said sealing sleeve and said conductor; an elastic, self-curing composition in said sealing gap for sealing it.
 7. Means for securing the crimped end of a wave guide, comprising: a wave guide comprised of an annular, tubular conductor, said conductor having an end portion that is to be crimped and secured; an attachment part; a separate conductor part for serving as a continuation of said conductor; said attachment part and said conductor part having respective opposed end faces defining an annular gap therebetween, said attachment part and said conductor part being oriented and positioned such that said conductor end portion is crimped so as to be oriented to extend generally radially outwardly of said conductor and said conductor end portion is in said gap between said opposed end faces; a flexible, membrane-like, annular sealing element in said gap; said sealing element having a radially more inwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said sealing element also having a radially more outwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said inward and said outward lands being spaced apart radially a first distance; said conductor end portion being of a length such that it extends radially outward so as to be between said inward land and said conductor part end face; said conductor end portion having an end edge and said end portion being of a length such that said end edge is between said inward and said outward lands; said sealing element being of a thickness and said lands being of a length axially of said conductor and said sealing elements having such flexibility that said inward land clamps said conductor end portion against said conductor part end face and said outward land clamps against said conductor part end face without contacting said conductor end portion; said first radial distance between said inward and outward lands being great enough to cause said lands to be separated from each other a distance at their respective clamping surfaces with said conductor end portion and with said conductor part end face to provide such clearance as to maintain the recited relationship of said conductor end portion with said inward and outward lands despite normal non-uniformity of said radial length of said conductor end portion; a sealing sleeve section of said attachment part surrounding said conductor and extending away from said conductor part; said sealing sleeve being of a size to define a sealable gap between said sealing sleeve and said conductor; a sealing ring in said sealable gap; said sealing ring being shaped to sealingly pass around the exterior of said conductor and being of a generally circular cross-section and being of a thickness to seal closed said sealable gap.
 8. The means for securing the crimped end of a wave guide of claim 7, further comprising sealing ring compression means extending into said sealable gap and engaging said sealing ring on the side thereof which causes said compression means to bias said sealing ring against said attachment part and said conductor to seal said sealable gap.
 9. The means for securing the crimped end of a wave guide of claim 8, wherein said ring compression means comprise means movable along said conductor toward said conductor part and includes an abutment on said movable means that is biasable against said sealing ring; means in said sealable gap for restraining said sealing ring against movement under bias of said ring compression means.
 10. Means for securing the crimped end of a wave guide, comprising: a wave guide comprised of an annular, tubular conductor, said conductor having an end portion that is to be crimped and secured; an attachment part; a separate conductor part for serving as a continuation of said conductor; said attachment part and said conductor part having respective opposed end faces defining an annular gap therebetween, said attachment part and said conductor part being orieNted and positioned such that said conductor end portion is crimped so as to be oriented to extend generally radially outwardly of said conductor and said conductor end portion is in said gap between said opposed end faces; a flexible, membrane-like, annular sealing element in said gap, said sealing element having a radially more inwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said sealing element also having a radially more outwardly located annular sealing land extending around it and extending axially of said conductor toward said conductor part end face; said inward and said outward lands being spaced apart radially a first distance; said conductor end portion being of a length such that it extends radially outward so as to be between said inward land and said conductor part end face; said conductor end portion having an end edge and said end portion being of a length such that said end edge is between said inward and said outward lands; said sealing element being of a thickness and said lands being of a length axially of said conductor and said sealing elements having such flexibility that said inward land clamps said conductor end portion against said conductor part end face and said outward land clamps against said conductor part end face without contacting said conductor end portion; said first radial distance between said inward and outward lands being great enough to cause said lands to be separated from each other a distance at their respective clamping surfaces with said conductor end portion and with said conductor part end face to provide such clearance as to maintain the recited relationship of said conductor end portion with said inward and outward lands despite normal non-uniformity of said radial length of said conductor end portion; said conductor being ovular in shape and at least said inward land being coaxially ovular to said conductor and being correspondingly shaped; said conductor end portion having a free end edge which is cut off obliquely such that when said end portion is crimped into said gap, said end portion extends radially outwardly from the fold of the crimp generally a constant distance annularly around said end portion. 